What is an object in Java?

What is an object in Java?

An entity that has state and behaviour is known as an object e.g., chair, bike, marker, pen, table, car, etc.

It can be physical or logical (tangible and intangible). The example of an intangible object is the banking system.

An object has three characteristics:

1] State: represents the data (value) of an object.

2] Behaviour: represents the behaviour (functionality) of an object

such as deposit, withdraw, etc.

3] Identity: An object identity is typically implemented via a unique

ID. The value of the ID is not visible to the external user. However,

it is used internally by the JVM to identify each object uniquely.

For Example, Pen is an object. Its name is Reynolds; colour is white,

known as its state. It is used to write, so writing is its behaviour.

An object is an instance of a class. A class is a template or blueprint

from which objects are created. So, an object is the instance (result) of a class.

Object Definitions:

• An object is a real-world entity.
• An object is a runtime entity.
• The object is an entity which has state and behaviour.
• The object is an instance of a class

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